• Journal of Korean Society of Transportation
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• v.34 no.2
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• pp.146-157
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• 2016

The objective of this study is to actualize a statistical model of the 3-detector simplification model, which was proposed to detect outbreak situations by Daganzo in 1997 and to verify the statistical appropriacy thereof. This study presents the calculation process of the 3-detector simplification model and realizes the process using a statistics program. Firstly, the model was applied using data on detector of the main highways on which there is no entrances or exits. Moreover, in order to statistically verify the 3-detector simplification model, accumulative traffics for 30 seconds period, which reflects the dynamic changes of traffics due to shock wave, were estimated for outbreak traffics and steady flow, and the error of acquired data was statistically compared with that of the actual accumulative traffics. As a result, the error ratio between steady and incident cumulative flows has reached its maximum after 2-3 hours from an accident. Moreover, the incident traffic flows by accidents and the stade flows are heterogeneous in terms of their dispersion and means.

• Journal of Intelligence and Information Systems
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• v.22 no.2
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• pp.115-125
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• 2016

The Bollinger Band indicating the current price position in the recent price action range is obtained by adding/substracting the simple standard deviation (SSD) to/from the simple moving average (SMA). In this paper, we first compare the characteristics of the SMA and the exponential moving average (EMA) in the operator's point of view. A basic equation is obtained between the interval length N of the SMA operator and the weighting factor ${\rho}$ of the EMA operator, that makes the centers of the 1st order momentums of each operator impulse respoinse identical. For equivalent N and ${\rho}$, frequency response examples are obtained and compared by using the discrete time Fourier transform. Based on observation that the SMA operator reacts more excessively than the EMA operator, we propose a novel exponential standard deviation (ESD) band centered at the EMA and derive an auto recursive formula for the proposed ESD band. Practical examples for the ESD band show that it has a smoother bound on the price action range than the Bollinger Band. Comparisons are also made for the gap corrected chart to show the advantageous feature of the ESD band even in the case of gap occurrence. Trading techniques developed for the Bollinger Band can be straight forwardly applied to those for the ESD band.

• Journal of Korean Society of Steel Construction
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• v.10 no.4 s.37
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• pp.789-799
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• 1998

The purpose of this study is to propose the prototypes of bolted end plate moment connection between CFT column and H-beam sections. Nine different types of bolt are designed in this study. The shapes of those bolt are straight. bent, hooked or stud-type. The end plate moment connection between CFT column and H-beam sections which are jointed by those bolts are studied experimentally to compare their performances. The simple beam bending tests are carried out to investigate the structural behavior of beam-to-column connections. The experimental results show that some of the bolted end plate connection types have quite good performance in the structural behavior but still have a lot of week points to be solved for the efficiency of construction.

• The Journal of the Korean bone and joint tumor society
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• v.14 no.2
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• pp.182-186
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• 2008

Simple bone cysts are common, benign bone tumor and for the treatment, curettage with bone grafting, resection and intralesional steroid or autogenic bone marrow injections were usually performed. Simple bone cysts of the calcaneus are relatively uncommon and curettage with autologous bone grafting were proposed for management rather than intralesional steroid injections. We would like to report 9 year-old male with calcaneal simple bone cyst treated satisfactorily by minimally invasive endoscopic curettage and autologous bone grafting with review of the relevant literature.

• Proceedings of the Korean Society of Computer Information Conference
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• 2013.07a
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• pp.181-184
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• 2013

우리 민법에 상속인이 민법 제1019조 제1항의 기간 내에 한정승인 또는 포기를 하지 아니한 때에는 단순승인을 한 것으로 본다고 하여 그동안 상속인들에게 지나치게 불리하다는 비판을 받아왔던 규정이 1998년 8월 27일 선고된 헌법재판소 결정(96헌가 22 등)에 의하여 헌법불합치결정을 받았다. 이에 따라 2002년 1월 14일 법률 제6591호로 공포 시행된 개정민법 제1019조 제3항으로 "민법 제1019조 제1항의 규정에 불구하고 상속인은 상속채무가 상속재산을 초과하는 사실을 중대한 과실 없이 제1항의 기간 내에 알지 못하고 단순승인을 한 경우에는 그 사실을 안 날부터 3월내에 한정승인을 할 수 있다."는 규정이 신설되었다. 그러나 민법 제1019조 제3항은 상속인들에게 구제의 길이 열리기는 하였으나 상속인의 보호가 제한적이고 상속인에게 한정승인만을 허용하고 상속포기의 선택을 제한하여 상속인의 승인 포기의 선택권행사에 문제가 있다고 본다. 따라서 이 논문에서는 상속의 승인과 포기에 관한 문제점을 검토해보고 상속인과 이해당사자들 간 모두에게 불리함이 없이 가장 공평하고 합리적인 개선방안을 제시하고자 한다.

• Journal of the Korean Data and Information Science Society
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• v.25 no.2
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• pp.305-315
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• 2014

In a simple linear regression, a linear relationship between an explanatory variable and a response variable can be easily recognized in the scatter plot of them. The lack of fit test for the replicated data is commonly used for testing the linearity but it is not easy to test the linearity when the explanatory variable is not replicated. In this paper, we propose three new test statistics for testing the linearity regardless of replication using the principle of average slope and validate them through several simulations and empirical studies.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2009.04a
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• pp.15-17
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• 2009

The line simplification method based on the turning function is studied in this paper for conversion of ground plan data to geospatial data to update the digital map. This method eliminate vertices effectively by estimating the length and the angle between the vertices based on the turning function which is useful to express the shape of linear feature. As the result, this method shows high shape similarity, high elimination rate of vertices and 100% of satisfaction degree to the drawing rules. Thus this line simplification method is judged to be effective in updating the digital map with ground plans.

• Journal of the Korea Society of Computer and Information
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• v.18 no.2
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• pp.49-57
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• 2013

To improve the quality of magnified image, two schemes were proposed. The one is used to estimate simple convex surface and simple concave surface using the information of adjacent pixel values, and the other scheme is used to produce magnified image using the characteristics of simple convex surface and simple concave surface. The magnified image using the proposed scheme is more similar to real image than the magnified image using the previous schemes. The PSNR values of the magnified images using the proposed scheme are greater than those of the magnified images using the previous interpolation schemes.

• Transactions of the Korean Society of Mechanical Engineers
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• v.16 no.8
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• pp.1485-1492
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• 1992

While the vibration of circular plates were considered by many researchers, rather less attention is given to elliptical plates. In the present paper, the Rayleigh-Ritz mothod is used to obtain an eigenvalue equation for the free flexural vibration of thin elliptical plates having the classical free, simply suported or clmped boundary condition. Circular plates are included as a special case of the elliptical plates. Products of simple polynomials are used as the admissible functions and a recurrence relationship facilitates the evaluation of the necessary integrals. The analysis is developed for rectilinear orthotropic plates but the numerical results are given for isotropic plates with various aspect ratios.

• Journal of the Korean Society of Safety
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• v.16 no.2
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• pp.130-135
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• 2001

The additional stresses and displacements produced by the use of long rail, typical of the high-speed railway, are investigated for the Taiwan high-speed railway bridges. In addition, an important special feature of the Taiwan high Speed Railway Design Specifications specifies that service earthquake has to be considered during the rail-structure interaction analysis before evaluating the stresses and relative displacements of the bridge. As pound motion is taken into account under seismic event the seismic response of the structure is applied as displacement in the rail-structure interaction analysis. The stresses and relative displacements of the structure are checked according to the consideration of seismic loading.